A development board for the ESP12 and ESP12E WiFi modules.
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ESP12_DEV_00
ESP12_DEV_01
README.md

README.md

ESP12_DEV

A development board for the ESP12 and ESP12E WiFi modules. Featuring some useful sensors and required peripherals to make it work.

Rev 00

ESP12_DEV_00

Initial board version with 3.3V LDO and 5V LDO.

Known issues :

  • TXB0106 symbol is wrong resulting in a short circuit
  • 3V3 LDO will get hot when board is powered with 12V

Rev 01

ESP12_DEV_01

  • Replaced the 3.3V LDO with a TPS562209 based switching power supply to reduce power dissipation.
  • Added more capacitors to increase stability

Features

  • 3V3 level FTDI-compatible UART pin header
  • push buttons for reset and boot
  • 7 - 12VDC power input
  • 5V power input possible when bypassing internal 5V LDO with 0 Ohm resistor or ferrite bead.
  • 6 bidirectional 5V I/O pins
  • Microphone
  • Temperature and humidity sensor
Component Description Notes IO pin
TXB0106 6 bit level translator Interfacing with 5V I/O 4,9,10,12,13,14
DS18B20 1-Wire temperature sensor Shares pin with DHT11 5
DHT11 Temperature and humidity sensor Shares pin with DS18B20 5
LED General purpose LED 16
EKMC1601113 Digital motion detection Shares I/O pin with TXB0106 4
MIC Electret Microphone with amplifier circuit ADC has max input of 1V ADC